Partsam 2PCS 7440 7440NA 7443 7444NA 7505 992 W21W T20 White/Amber Switchback Dual Color High brightness 60-3528-Epistar-Dual Chip-SMD LED Car Turn Signal Light Bulbs Features: Each SMD chip have Dual Chip Modules and can shine Dual colour, Dual light source. Build-in high quality internal IC chip electronic components. Easy installation, just plug play. Faster on/off response time and vibration resistant. Attention: Don't be fooled by the fake seller and counterfei Interchange Part Number: 7440, 7440A, 7443, 7444NA, 7505, 992, W21W, T20; Application: Front Trun Signal/Switchback; The model is as the same as original light, no need to change car wire rote, just replace it directly; If the LED does not light up, simply flip it 180 degrees (reverse the polarity). The turn signal flashes "amber-off-amber-off," instead of "amber-white-amber-white," which makes it easier to see. Socket CK or StandardIf you are not sure your socket type ck or standard, please use the keyword (CK or Standard Test) on youtube,the video will show you how to test the socket.( please check before placing an order, Our bulbs come with Standard Base, NOT CK Type, put standard bulbs into CK type sockets, the bulb will work improperly and may POP THE FUSE.-- Most TOYOTA vehicle use CK socket. NOTES: 1) Don't forget Resistors if flashingBlinking or Code error problems occurs.(2) If your bulb does not light up or occurs blinker, please check if your relay is broken and whether your socket is senescent or not.(3) For 7443 and 3157, please raise the pin when installing the bulbs if your bulb does not light or occurrs blinker.